There are severe constraints on the supply side of the provision of infrastructure in Asia. The infrastructure financing gap between what is invested in Asia-Pacific (around US$48 billion) and what is needed (US$228 billion) is around US$180 billion every year.
Placed in the centre of a garden bed, they can be underplanted with low growing shrubs and bulbous plants for an harmonious effect; or underplanted with grass for a contrasting statement. Alternatively, the tree can be situated at the end of a long garden to draw visitors out into the garden.
The ages and sizes of the oldest trees are similar to those found in black ash old-growth forests. It is rare to find species that require large amounts of light, such as willow, cottonwood, aspen, birch, and balsam poplar.At most these species grow in small patches within the old-growth forests.ld-growth forests consist of a mixture of tree sizes and ages, and young black ash can become established and grow beneath their parent trees. Black ash trees in old growth may be 200 years old or more.